#pragma once
#include <iostream>
using namespace std;


class Date
{
	friend void operator<<(ostream& out, const Date& d);
public:
	Date(int year = 1, int month = 1, int day = 1);
	void Print();
	int GetMonthDay(int year, int month)
	{
		static int MonthDay[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
		if (month == 2 && year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
		{
			return 29;
		}
		return MonthDay[month];
	}

	bool operator==(const Date& d1);
	
	Date operator+(int day);
	Date& operator+=(int day);

	bool operator<(const Date& d);
	bool operator>(const Date& d);
	bool operator!=(const Date& d);
	
	Date& operator-=(int day);
	Date operator-(int day);

	int operator-(const Date& d);

private:
	int _year;
	int _month;
	int _day;
};
